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Author Topic:   305 heads
dirttrackracer
Dirt Newbie

Total posts: 0
posted January 21, 2002 03:36 PM
My son is going to try and raise the compression in his hobby stock,he has to run flat top pistons,but can run any oem chevy head except camel humps.What number 305 head should we look for?

CUSTOMPERFORMANCE
Dirt Forum Champ
Total posts: 639
posted January 21, 2002 05:19 PM
#605 305 head of the 4 barrel truck or car engine. should have 1.84 intake and 1.5 exhaust. i would open up for 1.94 int and 1.6 exhaust.

BK19
Dirt Freak

Total posts: 285
posted January 21, 2002 06:58 PM UIN: 40696038
i believe the casting number is actually #601

Scoot
Dirt Freak

Total posts: 330
posted January 21, 2002 07:37 PM
416,440 and 601 all have 1.84",1.5 valves and 58cc. www.mortec.com has all that info.

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Scoot

redneck bubbas racing
Dirt Freak

Total posts: 213
posted January 22, 2002 12:31 AM
Also the 450.

CUSTOMPERFORMANCE
Dirt Forum Champ
Total posts: 639
posted January 22, 2002 06:50 AM
i stand corrected#601 is what i was thinking of and i beleive they have the smallest combustion chamber.

avila
Dirt Full Roller

Total posts: 55
posted January 22, 2002 03:04 PM
If you must use the 305, they make good bottom end power, but don't breathe
very well at the top end. If you can you
better port them all you can to help them breathe.

Scoot
Dirt Freak

Total posts: 330
posted January 22, 2002 07:34 PM
the 450 is 60cc not sure about the valves.

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Scoot

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